Pneumatic device applicable to rivet-heating furnaces.



No. 66!,950. Patented Nov. 20, I900.v

B. A. BROWN.

PNEUMATIC DEVICE APPLICABLE TO RIVET HEAT ING FURNACES.

(Application filed May 19, 1900.;

(No Model.)

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TATES ITE ATENT OFFICE.

BERT A. BROWN, OF BRISTOL, CONNECTICUT.

SPECIFICATION forming part of Letters Patent No. 661,950, dated November20, 1900.

Application filed May 12, 1900. Serial No. 161450- (No model.)

To aZZ whom it may concern.-

Be it known that I, BERT A. BROW'N, a citizen of the United States ofAmerica, having my residence and post-office address at Bristol, in thecounty of Hartford and State of Connecticut, have invented a certain newand useful Improvement in Pneumatic Devices Applicable to Rivet HeatingFurnaces, of which the following'is adescription, reference being bad tothe accompanying drawings, wherein- Figure 1 is a view, largely incentral vertical section, of a rivet-heating furnace embodying saidimprovement. Fig. 2 is a view in central longitudinal section, on alarger scale than in Fig. 1, of the valve apparatus in Fig. 1. Fig. 3 isa detail sectional view of a portion of the valve and valve-cylinder onthe plane denoted by the dotted line 00 00. Fig. 4 isa view of the faceof the valve-bonnet.

The object of the improvement is the production of an apparatus in thenature of a pneumatiodevice applicable to a rivet-heating furnace.

In the accompanying drawings the letter (1 denotes a rotatable valve ofa conical shape exteriorly. It is borne in a valve-cylinder b, which isinteriorly shaped to conform to the conical shape of the valve.

The letter 0 denotes the valve-bonnet screwing upon the valve-cylinder.

The letter a denotes the valve-stem, which has upon it an operatingWheel, handle, or lever.

The letter 01 denotes a spring interposed between the valve andvalve-bonnet,whose tendency it is to hold the valve snugly to its seat.In order that it may not perform this function unduly, there is a nut ecarried on the valve-stem and bringing up against a proper surface onthe valve-bonnet. The nuts 6 and e embrace between them the spring f. Onthe outer face of the valve-bonnet there are stop-Inortises c for thisspring to drop into, these st-op-mortises being coincident in positionwith the valve-conduits in the valve soon to be described.

The valve-cylinder is pierced by a fluidpressure inlet g, which isconnected by a suitable pipe with a source of fluid-pressure, in thepresent case and for the purposes of a rivet-heating furnace anair-reservoir containing air at, say, seventy-five pounds pressure.

The letter h denotes valve-conduits in the valve. By the rotation of thevalve they are capable of being brought severally and successively intoconnection, one at a time, with the fluid-pressure inlet g. Thefluid-pressure inlet g has countersinks g on each side, so that inchanging from one jet-tube to the next in series with the pressure onthere is never a time when the stream of air is cut off completely.

The letterz' denotes jet-tubes severally appurtenant to the severalvalveconduits. Each has a delivery-orifice at the end. It is animportant and essential feature of the fluid-pressure inlet 9 of thevalve-conduits h and ,of the interior diameter of the jettubes 1' thatthey are all of ample size to allow the initial pressure of thecompressed fluid to extend to the point of delivery from the jet-tubes.These jet-tubes, which may be more or less in number, havedelivery-orifices of diiferent sizes, so that by bringing one or anotherof them into connection with the source of fluid-pressure more or lessof the fluid under pressure may have delivery through the valve, asdesired.

The letter is denotes a stop carried on the outer face of the valve, andZ denotes a cooperating stop carried on the inner face of thevalve-bonnet.

The letter at denotes a conducting-tube removed from said jet-tubes, butin line with the stream of fluid delivered by a jet-tube when it is inconnect-ion with the source of fluid-pressure, wherefore the center ofthe conducting-tube m is not in line with the center of the valve.

The letter n denotes a conduit adapted to admit fluid, or, at least,flowing material, to contact and mixture with the stream of fluidflowing from a jet-tube. The upper part of the construction connectingthe tube on with the valve parts is preferably a closed dome, as shown.Cases may arise when it may be preferable to have that connectionspiderlike or open-work. As shown in Fig. 1, the conducting-tube mdelivers below the twyer of a furnace, which is well adapted for thepurpose of heating rivets near by the place where they are to be usedand set. In that furnace, 0 denotes the furnace-casing, the interior ofwhich practically forms an expansion-chamber p.

The letter r denotes the fire-pot; s, the twyer; t, the bail; u, thefloor or bottom supported on perforated flange to admit air, and t; adoor or hand-hole to permit cleaning of the chamber 0.

The pressure of the fluid flowing through the apparatus is red need inthe operation, the device being in that regard a transference f romhigher to lower pressure; but in the connecting jet-tubes adapted to bebrought successively into connection with the source of fluid-pressure;and the conduit adapted to admit fluid or flowing material to contactand mixture With fluid flowing from a jet-tube; all substantially asdescribed and for the purposes set forth.

2. In combination; the valve-cylinder containing the fluid-pressureinlet; the rotatable valve provided with plural valveconduits andconnecting jet-tubes adapted to be brought successively into connectionwith said fluidpressure inlet; the conducting-tube centrally in linewith the center of a jet-tube when in connection with the source offluid-pressure and opening beneath the twyer of the furnace; and theconduit adapted to admit air to contact and mixture with the fluidflowing from the jet-tube; all substantially as described and for thepurposes set forth.

BERT A. BROWN.

Witnesses:

FRANK BRUEN, JOHN '1. OHIDSEY.

